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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Givnish, Thomas J. |
| Description | Country affiliation: United States Author Affiliation: Givnish TJ ( Department of Botany, University of Wisconsin-Madison, Madison, WI, 53706, USA.) |
| Abstract | Adaptive radiation is the rise of a diversity of ecological roles and role-specific adaptations within a lineage. Recently, some researchers have begun to use 'adaptive radiation' or 'radiation' as synonymous with 'explosive species diversification'. This essay aims to clarify distinctions between these concepts, and the related ideas of geographic speciation, sexual selection, key innovations, key landscapes and ecological keys. Several examples are given to demonstrate that adaptive radiation and explosive diversification are not the same phenomenon, and that focusing on explosive diversification and the analysis of phylogenetic topology ignores much of the rich biology associated with adaptive radiation, and risks generating confusion about the nature of the evolutionary forces driving species diversification. Some 'radiations' involve bursts of geographic speciation or sexual selection, rather than adaptive diversification; some adaptive radiations have little or no effect on speciation, or even a negative effect. Many classic examples of 'adaptive radiation' appear to involve effects driven partly by geographic speciation, species' dispersal abilities, and the nature of extrinsic dispersal barriers; partly by sexual selection; and partly by adaptive radiation in the classical sense, including the origin of traits and invasion of adaptive zones that result in decreased diversification rates but add to overall diversity. |
| File Format | HTM / HTML |
| ISSN | 0028646X |
| Issue Number | 2 |
| Volume Number | 207 |
| e-ISSN | 14698137 |
| Journal | New Phytologist |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2015-07-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Botany Adaptation, Physiological Biodiversity Biological Evolution Phylogeny Plants Genetics Ecology Genetic Speciation Lupinus Phenotype Phylogeography Journal Article Research Support, U.s. Gov't, Non-p.h.s. Review |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science |
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